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DochEvi [55]
3 years ago
14

If a customer wants to cover an area 20ft wide by 57ft long with rock, how many square feet does he have to cover?

Mathematics
2 answers:
OlgaM077 [116]3 years ago
6 0
He will need to cover 1,140 square feet because 20 x 57 = 1,140
uranmaximum [27]3 years ago
4 0
20*57=1140 ft²
...........................
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A triangle is placed in a semicircle with a radius of 7mm , as shown below. Find the area of the shaded region. Use the value 3.
timurjin [86]
We either need to see a picture of this and/or get more information about the measurements of the triangle. In general, the area outside of the triangle will be the area of the semi-circle minus the area of the triangle itself, or: 1/2*49*3.14 - 1/2 b*h of the triangle. That first part, which is the area of the semi-circle, works out to 76.93 So based on the info we have, it becomes 76.93 - 1/2*b*h of the triangle = area outside of triangle. 
8 0
3 years ago
A researcher computes the definitional formula for SS, and finds that Σ(x − M) = 44. If this is a sample of 12 scores, then what
olga_2 [115]

Answer:

Option B.

Step-by-step explanation:

Given information:

Σ(x − M) = 44

where, M is mean.

Sample size = 12

The computational formula for sample variance is

s^2=\dfrac{\sum (x-M)^2}{N-1}

where, M is sample mean and N is sample size.

Substitute Σ(x − M) = 44 and N=12 in the above formula.

s^2=\dfrac{44}{12-1}

s^2=\dfrac{44}{11}

s^2=4.0

The sample variance is 4.0.

Therefore, the correct option is B.

5 0
3 years ago
What is the radius of 18 circle?<br><br><br><br><br>​
yulyashka [42]
To find the radius, then, we insert 18 in for the circumference. So 18=2∏r. Solving for r gives 9/∏, or approximately 2.86 inches.
8 0
3 years ago
Someone help solve ill gift you nitro :)
Tems11 [23]
1/3•3.14•. r^2 •h

1/3•3.14•20^2•25

10466.6667

that rounds up to 10,467.

I could be wrong though!

hope this helps! :)
7 0
3 years ago
I need help my teacher talks to fast and i don't get anything he says
LUCKY_DIMON [66]

Answer:

2$+(1.29$ x 30)=40.70$

Step-by-step explanation:

6 0
2 years ago
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